JPS61223772A - Removing method for protection sheet in copying machine - Google Patents

Abstract

PURPOSE:To discharge automatically a sheet 2 by mounting a photosensitive body which has its surface protected by a protection sheet and then removing the protection sheet by bringing a separation claw arranged at the periphery of the photosensitive body into contact with the protection sheet through specific switching operation. CONSTITUTION:The separation claw 24 is rotated to a state shown by a broken line and the photosensitive body 18 wound with the protection sheet 32 is inserted into a machine body 1; and then a service switch is turned on. The claw 24 rotates to a state shown by a solid line in response to said on operation so that the front edge part of the claw abuts on the sheet 32, and the photosensitive body 18 rotates in the clockwise direction of copying mode to engage the other end part 33a of a stainless steel plate 33 with the claw 24, so that the sheet is peeled off from the other end part 33b. This separated sheet 32 is guided to a conveying device 26 through a separation roller 23 and then discharged to a tray 29 outside the machine through the heat roller 27a, pressure roller 27b, and paper discharge roller 28 of a fixing device 27. Thus, the sheet 32 after the photosensitive body is loaded is discharged automatically by turning on the service switch.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing a protective sheet in a copying machine, that is, a method for removing the protective sheet from the surface of a photoreceptor.

In the Jumei Limb Blood Electrostatic Copying Device, there is a drum-shaped photoreceptor surrounded by
Various devices such as a charging device, a developing device, a transfer device, a peeling device, and a cleaning device are arranged close to the surface of the photoreceptor.

On the other hand, the mechanical strength of the photosensitive layer in the photoreceptor is extremely low, so its surface is easily scratched, and if scratches occur, they will remain on the image. Therefore, when inserting the photoreceptor into a copying machine, it is necessary to insert the photoreceptor so that the surface of the photoreceptor does not come into contact with the various devices described above. However, in actual insertion work, even if careful attention is taken, there is a risk of accidentally damaging the surface of the photoreceptor.

As a means for solving such inconveniences, for example, Japanese Patent Laid-Open No. 192983/1983 describes a method in which a protective sheet is wrapped around the surface of the photoreceptor when the photoreceptor is inserted into a copying machine.

This protective sheet must be peeled off from the photoreceptor after the photoreceptor is inserted into the copying machine. Therefore, this protective sheet is formed with a handle protrusion that projects into the photoreceptor insertion opening when the protective sheet is wrapped around the photoreceptor. That is, the protective sheet is peeled off by pulling the handle protrusion in a direction opposite to the direction in which the photoreceptor is inserted.

However, the method described in the above publication has the disadvantage that the protective sheet must be manually peeled off from the photoreceptor.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a method by which a protective sheet for a photoreceptor can be automatically removed from the photoreceptor using a copying machine.

In order to achieve the above-mentioned object of reading the divination, the present invention is provided with a photoreceptor whose surface is protected by a non-transparent protective sheet formed by polymerizing and bonding the side edges of the photoreceptor inside the body, By a predetermined switching operation, the separation claws disposed around the photoreceptor are brought into contact with the protective sheet, and at least one of the photoreceptor and the transport mechanism is brought into contact with the protective sheet.
The protective sheet is removed from the fuselage by driving the protective sheet.

By covering the surface of the standing photoreceptor with a light-impermeable protective sheet, damage to the surface of the photoreceptor and optical fatigue can be avoided until the photoreceptor is inserted into the machine.

Further, after the photoreceptor is installed inside the machine, as the photoreceptor is driven by a switching operation, the protective sheet is peeled off from its overlapping joint by a separating claw and sent out of the machine by a conveying device.

FIG. 1 is a sectional view showing a copying machine according to an embodiment of the present invention.

First, the general structure and operation of a copying machine will be explained, and then the protective sheet removing method of the present invention will be explained.

The copy sheets 4 in each cassette 2.3 mounted on the side of the machine body 1 are selectively fed one by one from the cassette 2.3 to the transport roller 7.8 by the respective paper feed rollers 5.6. .

A document 1 is placed on a horizontal transparent plate 9 provided at the top of the machine 1.
0 is pressed by the document holding cover 11. The light from the exposure lamp 12 passes through the horizontal transparent plate 9 and illuminates the original 1.
0, and the original image is reflected by the first mirror 13 of the optical device.
, a second mirror 14, a third mirror 15, a lens 16, and a fourth mirror 17, and then an image is formed on a drum-shaped photoreceptor 18. A reflecting plate 19 is provided on the back of the exposure lamp 12 to efficiently irradiate the original 10 with light from the exposure lamp 12 .

The exposure lamp 12, the first mirror 13, and the reflection plate 19 integrally move back and forth in the directions of arrows A1 and A2, and the original 10 is optically scanned by lighting the exposure lamp 12 on the outward path. Further, the second mirror 14 and the third mirror 15 integrally move back and forth in the directions indicated by arrows A 3 and A 4 by a movement amount that is 1/2 of the movement amount of the exposure lamp 12 .

On the other hand, around the photoreceptor 18, a charging device 20, a developing device 21. Transfer device 22, peeling roller 23. A peeling claw 24, a cleaning device 25, etc. are arranged close to each other.

As the photoreceptor 18 rotates, a document image is formed on the surface of the photoreceptor 18 charged by the charging device 20.
An electrostatic image is formed on the surface of the photoreceptor 18. This electrostatic image is developed into a toner image by a developing device 21, and this toner image is transferred by a transfer device 22 onto the copy paper 4 conveyed from the conveyance roller 8. The copy paper 4 on which the toner image has been transferred is peeled off from the surface of the photoreceptor 18 by a peeling tool 23 and a peeling claw 24, and is conveyed to a thermal fixing device 27 by a conveying device 26, where the copy paper 4 having completed the fixing is further removed. The paper passes through a paper ejection roller 28 and is ejected into a tray 29 provided on the side of the machine body 1. Note that 31 is a cooling fan.

Next, the protective sheet 32 used in the present invention will be explained with reference to FIGS. 2(a) and (bl).

FIGS. 2(a) and 2(b) show the protective sheet 32 in its unfolded state. This protective sheet 32 is opaque and has a flexible felt 3 on the top surface of a stainless steel plate 33 as a base material.
4 is polymerized and bonded. stainless steel plate 3
One side end 33a of 3 is a peeling protrusion protruding from the felt 34. Further, an adhesive 36 is applied to the upper surface of this negative end 33a to releasably adhere the lower surface of the other end 33b of the stainless steel plate 33 with an appropriate adhesive force. For example, the adhesive 36 is 1'3M.
Synthetic rubber adhesives such as Spray Glue 55'' (trade name) are known.

On the other hand, in order to employ the protective sheet 32, the copying machine shown in FIG. 1 is provided with a service switch (not shown). By turning on the service switch, at least the heat roller 27 of the heat fixing device 27
The heater circuit for a is turned off, but the peeling roller 23, the conveyance device 26, and the heat fixing device 27, which serve as a device for conveying the protective sheet from the photoreceptor 18 to the tray 29, are turned off.
The heat roller pair 27a, 27b and the paper discharge roller 28 are driven, and the peeling claw 24 is rotated from the broken line state to the solid line state in FIG. 3.

Next, a method of using the protective sheet 32 will be described.

FIG. 3 shows a state in which the protective sheet 32 is wrapped around the surface of the photoreceptor 18. In this case, the felt 34 is applied as an elastic pad over the entire surface of the photoreceptor 18.

Therefore, the surface of the photoreceptor 18 will not be damaged by contact with the stainless steel plate 33. Also, when the protective sheet 32 is wrapped around the photoreceptor 18, as shown in FIG. The adhesive 36 on the one side end 33a side adheres to the surface of the other side end 33b, so that the state in which the protective sheet 32 is wrapped around the photoreceptor 18 is maintained. As shown in the figure, in the overlapping joint portion 33c of the stainless steel plate 33 formed by the adhesive 36, the − side end portion 33a projects obliquely outward with respect to the other side end portion 33b.

In this way, the surface of the photoconductor 18 is covered with the non-transparent protective sheet 32, so that the photoconductor 18 is
The surface of the photoreceptor 18 is prevented from being scratched or optically fatigued until it is incorporated into the photoreceptor 18.

On the other hand, in order to install the photoreceptor 18 shown in FIG. The photoreceptor 18 with the protective sheet 32 still wrapped around it after being moved and released.
is inserted into the fuselage 1 from the front side to the back side of the paper in FIG. At this time, the charging device 20, the developing device 21, the transfer device 22, the peeling roller 23, and the cleaning device 2
5 or the like, the surface of the photoreceptor 18 is not scratched because the contact is made with the stainless steel plate 33 of the protective sheet 32.

Thereafter, in FIG. 1, when the aforementioned service switch (not shown) is turned on, the peeling claw 24 rotates from the broken line state to the solid line state in FIG. As the photoreceptor 18 comes into contact with the surface of the plate 33 and rotates clockwise as in normal copying, the other end 33a of the stainless steel plate 33 engages with the peeling claw 24, and the other end 33b stripped from. In this way, the protective sheet 32 is peeled off from the photoreceptor 18, and this protective sheet 32 is
Furthermore, it passes through a peeling roller 23 and is guided to a conveying device 26 below, and is then led to a heat roller 27a of a heat fixing device 27 and a pressure roller 27.
b. The paper is discharged to a tray 29 outside the machine body 1 via a paper discharge roller 28.

By the way, in such a process of peeling off the protective sheet 32,
As mentioned earlier, even if the service switch is turned on,
Since the heater circuit of the heat fixing device 27 is disabled, the adhesive 36 of the protective sheet 32 and the felt 3
4 (therefore, the protective sheet 32 can be used again).

Note that although the adhesive 36 is used to join the both side ends 33a and 33b of the protective sheet 32, a hook-and-loop fastener called Velcro tape or the like may also be used.

In addition, the protective sheet 32 includes a stainless steel plate 33 and a felt 3.
4 is shown, but it may also be made of a single non-transparent synthetic resin film, such as polyethylene, polypropylon, polyethylene phthalate, polyvinyl chloride, etc.

As explained above, according to the method for removing a protective sheet in a copying machine of the present invention, the action of a conventionally used peeling claw can be effectively utilized, so that a photoreceptor whose surface is protected by a protective sheet can be removed. , by installing it inside the aircraft along with its protective sheet and performing the prescribed switching operation.
This has the advantage that the protective sheet can be peeled off from the photoreceptor and automatically discharged to the outside of the machine.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a copying apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view showing the unfolded state of the protective sheet.
Figure 2 (bl is a side view of Figure 2 (al), Figure 3 is a side view of a photoreceptor with a protective sheet attached. 1... fuselage, 18... photoreceptor, 24... peeling nail,
26... Conveyance device, 32... Protective sheet, 32a,
32b...Both end portions, 33c...Overlapping joint portion. Patent Applicant: Sanda Kogyo Co., Ltd. Agent, Patent Attorney: Takaharu Ohnishi Figure 2 (a) 17Ii3rIJ 33c, joint part

Claims (1)

[Claims] (1) A photoreceptor whose surface is protected by a non-light-transparent protective sheet whose side edges are polymerized and bonded is installed inside the fuselage, and separation is installed around the photoreceptor by a predetermined switching operation. A method for removing a protective sheet in a copying machine, comprising: bringing a claw into contact with the protective sheet, and driving at least a photoreceptor and a portion of a conveying mechanism to remove the protective sheet to the outside of the machine.